056
FNCA52 TJSJ 081930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST FRI MAY 8 2026
DISCUSSION
NO RAINFALL HAVE BEEN SEEN ACROSS THE SOUTHERN SECTIONS OF PUERTO
RICO SO FAR TODAY AND DRIER AIR MASS OVER THE REGION IS ALLOWING
RELATIVE HUMIDITY VALUES TO DROP INTO CRITICAL FIRE WEATHER
THRESHOLDS. THE CABO ROJO AND CAMP SANTIAGO RAWS STATIONS HAVE
BEEN REGISTERING RH VALUES IN THE UPPER 40S TO LOW 50S AND WINDS
SPEEDS IN AROUND 10 TO 13 MPH, WITH GUST AROUND 20 TO 23 MPH.
THEREFORE, AT THIS TIME CONDITIONS REMAIN FAVORABLE FOR THE
SPREAD OF WILDFIRES ALONG THE SOUTHERN COASTAL PLAINS OF PUERTO
RICO. SOME RELIEF IS EXPECTED THIS AFTERNOON AS SOME SHOWERS
SHOULD DEVELOP ACROSS SOUTHWESTERN PUERTO RICO. FIRE PARTNERS ARE
ENCOURAGED TO REMAIN VIGILANT AS SIMILAR CONDITIONS ARE LIKELY TO
PREVAIL OVER THE COMING DAYS.
PRZ014-090800-
SOUTHEAST COASTAL PLAINS-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 0 10 20
TEMP (24H TREND) 71 (-2) 90 (+2) 71 90
RH % (24H TREND) 89 (-2) 52 (-4) 89 55
WIND 20FT/EARLY(MPH) E 12 E 17 E 16 E 17
WIND 20FT/LATE(MPH) NE 10 E 19 NE 13 E 17
MIXING HGT(FT-AGL/MSL) 6070 5560
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 91050 88960
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-090800-
SOUTHERN HILLS-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10 20
TEMP (24H TREND) 68 (-2) 86 (+2) 68 86
RH % (24H TREND) 95 (0) 57 (-3) 95 60
WIND 20FT/EARLY(MPH) E 11 E 13 E 14 E 13
WIND 20FT/LATE(MPH) NE 11 E 14 NE 14 E 13
MIXING HGT(FT-AGL/MSL) 6540 6170
TRANSPORT WND (MPH) E 15 E 18
VENT RATE (KT-FT) 85020 98720
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-090800-
NORTH COASTAL PLAINS-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30 10
TEMP (24H TREND) 71 (-2) 89 (0) 71 90
RH % (24H TREND) 94 (0) 55 (-3) 93 57
WIND 20FT/EARLY(MPH) E 16 E 14 E 19 E 16
WIND 20FT/LATE(MPH) E 13 E 20 E 16 E 20
MIXING HGT(FT-AGL/MSL) 5480 5510
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 82200 88160
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-090800-
NORTHERN HILLS-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 0 20
TEMP (24H TREND) 69 (-2) 88 (+1) 69 88
RH % (24H TREND) 94 (-3) 57 (0) 94 58
WIND 20FT/EARLY(MPH) E 12 E 13 E 17 E 14
WIND 20FT/LATE(MPH) E 11 E 17 E 12 E 18
MIXING HGT(FT-AGL/MSL) 6370 6370
TRANSPORT WND (MPH) E 14 E 16
VENT RATE (KT-FT) 76440 89180
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-090800-
WEST COAST-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 10 30
TEMP (24H TREND) 70 (-2) 91 (+2) 71 91
RH % (24H TREND) 95 (-4) 56 (-2) 92 57
WIND 20FT/EARLY(MPH) E 16 E 12 E 18 E 14
WIND 20FT/LATE(MPH) E 14 E 13 E 16 E 14
MIXING HGT(FT-AGL/MSL) 5390 5750
TRANSPORT WND (MPH) E 9 E 13
VENT RATE (KT-FT) 43120 63250
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-090800-
EASTERN INTERIOR-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30 20
TEMP (24H TREND) 69 (-3) 87 (+1) 69 87
RH % (24H TREND) 95 (+2) 57 (-1) 95 60
WIND 20FT/EARLY(MPH) E 12 E 12 E 16 E 14
WIND 20FT/LATE(MPH) E 11 E 13 E 14 E 13
MIXING HGT(FT-AGL/MSL) 7000 6170
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 91000 92550
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-090800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40 20
TEMP (24H TREND) 67 (-3) 82 (+2) 68 82
RH % (24H TREND) 98 (+3) 64 (-1) 98 67
WIND 20FT/EARLY(MPH) E 9 E 11 E 12 E 12
WIND 20FT/LATE(MPH) E 9 E 12 E 12 E 12
MIXING HGT(FT-AGL/MSL) 5000 4820
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 70000 72300
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-090800-
CENTRAL MOUNTAIN RANGE-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 30 0 30
TEMP (24H TREND) 65 (-3) 86 (+4) 66 87
RH % (24H TREND) 96 (-3) 58 (-3) 97 60
WIND 20FT/EARLY(MPH) E 11 E 9 E 12 E 10
WIND 20FT/LATE(MPH) E 10 E 11 E 11 E 11
MIXING HGT(FT-AGL/MSL) 7300 6860
TRANSPORT WND (MPH) E 10 E 14
VENT RATE (KT-FT) 65700 82320
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-090800-
CAYEY MOUNTAIN RANGE-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 10 20
TEMP (24H TREND) 68 (-2) 83 (+2) 68 82
RH % (24H TREND) 97 (0) 63 (+1) 97 66
WIND 20FT/EARLY(MPH) E 8 E 12 E 11 E 11
WIND 20FT/LATE(MPH) E 8 E 12 E 12 E 11
MIXING HGT(FT-AGL/MSL) 6060 5680
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 84840 90880
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-090800-
VIEQUES-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40 20
TEMP (24H TREND) 74 (-2) 86 (0) 74 87
RH % (24H TREND) 88 (+4) 59 (0) 89 61
WIND 20FT/EARLY(MPH) E 16 E 16 E 19 E 17
WIND 20FT/LATE(MPH) E 14 E 16 E 18 E 16
MIXING HGT(FT-AGL/MSL) 3830 3640
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 65110 69160
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-090800-
CULEBRA-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40 20
TEMP (24H TREND) 75 (-2) 89 (+2) 75 89
RH % (24H TREND) 87 (+5) 57 (-4) 88 59
WIND 20FT/EARLY(MPH) E 14 E 14 E 19 E 18
WIND 20FT/LATE(MPH) E 14 E 16 E 18 E 14
MIXING HGT(FT-AGL/MSL) 3770 3610
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 64090 68590
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-090800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 40 20 0 10
TEMP (24H TREND) 71 (-2) 91 (+2) 72 91
RH % (24H TREND) 90 (-3) 51 (-4) 87 52
WIND 20FT/EARLY(MPH) E 11 E 18 E 14 E 19
WIND 20FT/LATE(MPH) E 11 E 19 E 12 E 20
MIXING HGT(FT-AGL/MSL) 5730 5860
TRANSPORT WND (MPH) E 15 E 20
VENT RATE (KT-FT) 74490 99620
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-090800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30 10
TEMP (24H TREND) 74 (-3) 86 (+1) 74 86
RH % (24H TREND) 88 (+7) 60 (-1) 90 62
WIND 20FT/EARLY(MPH) E 14 E 16 E 19 E 17
WIND 20FT/LATE(MPH) E 16 E 16 E 19 E 16
MIXING HGT(FT-AGL/MSL) 3670 3620
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 62390 65160
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-090800-
ST CROIX-
330 PM AST FRI MAY 8 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30 30
TEMP (24H TREND) 73 (-3) 87 (+1) 73 87
RH % (24H TREND) 89 (+4) 60 (-3) 90 63
WIND 20FT/EARLY(MPH) E 14 E 16 E 17 E 16
WIND 20FT/LATE(MPH) E 16 E 16 E 18 E 16
MIXING HGT(FT-AGL/MSL) 4780 4980
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 81260 89640
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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